//--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
// Copyright 2012 Microsoft Corporation. All Rights Reserved
// Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except in compliance with the License.   
// You may obtain a copy of the License at
// http://www.apache.org/licenses/LICENSE-2.0
// Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the specific language governing permissions and limitations under the License.
//--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------

namespace Preflight.Cloud.Verifications.Implentations
{
    using Microsoft.ServiceBus;
    using Microsoft.ServiceBus.Messaging;

    internal static class SafeExtensions
    {
        public static TopicDescription SafeGetTopic(this NamespaceManager manager, string name)
        {
            try
            {
                return manager.GetTopic(name);
            }
            catch (MessagingEntityNotFoundException)
            {
                return null;
            }
        }

        public static SubscriptionDescription SafeGetSubscription(this NamespaceManager manager, string topicName, string subscriptionName)
        {
            try
            {
                return manager.GetSubscription(topicName, subscriptionName);
            }
            catch (MessagingEntityNotFoundException)
            {
                return null;
            }
        }

        public static bool TryDefer(this BrokeredMessage message)
        {
            try
            {
                message.Defer();
                return true;
            }
            catch
            {
                return false;
            }
        }
    }
}
